Messages in this thread | | | Subject | Re: Wrong number of cpus detected/reported | From | Steven Cole <> | Date | 10 Jun 2003 15:04:01 -0600 |
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On Tue, 2003-06-10 at 14:36, Samuel Flory wrote: > John Appleby wrote: > > >>After the upgrade the system is reporting that the machine has 8 cpu > >>instead of 4. I have been looking for some kind of information on the > >>Internet (www.google.com/linux) about that but I didn't have success. > >> > >> > > > >I suspect that it is identifying 4 Xeon CPUs with Hyperthreading, which > >will correctly double the amount of processors your kernel thinks you > >have. Intel's Hyperthreading > > > >This ought to be a good thing... the only thing I don't quite understand > >is that I thought Hyperthreading was added in 2.4.17. > > > > > > > > Red Hat enabled basic hyperthreading support in their 2.4.9 eratta > kernels some where along the line. I just didn't think 1.4 Xeons did > HT. (Maybe the MP Xeons are different from the DP xeons.)
His does. From his cpuinfo:
processor : 7 vendor_id : GenuineIntel cpu family : 15 model : 1 model name : Intel(R) Xeon(TM) CPU 1.40GHz stepping : 1 cpu MHz : 1399.982 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm bogomips : 2798.38
See that ht flag near the end?
Don't know why he doesn't go with RH 9 or RH AS though.
Steven
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